1
Finely chop 1/2 cup onion and next 2 ingredients in a blender or food processor. Add olive oil, mango and lime juice and pulse until combined. Pour 1/2 cup mint sauce into a large resealable plastic bag with Knorr® Beef flavor Bouillon and steak. Close bag and marinade for 30 minutes in refrigerator.
2
Remove steak from marinade, discarding marinade. Grill or broil steak until desired doneness, turning once.
3
Arrange greens, tomatoes and remaining onions on a serving platter, then top with thinly sliced steak. Drizzle with remaining mint sauce.